14228368139

Committed 02 Apr 2025 07:54PM UTC coverage: 80.879% (-0.7%) from 81.608%

Build # 14228368139

Build Type

Pull #631

github

Committed by

web-flow

Commit Message

Merge fe2ceba4a into fde867b93

Pull Request Pull Request #631: Create clear command in payjoin-cli

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26 of 89 new or added lines in 5 files covered. (29.21%)

1 existing line in 1 file now uncovered.

5279 of 6527 relevant lines covered (80.88%)

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69.36

/payjoin-cli/src/app/v2.rs

use std::sync::Arc;

use anyhow::{anyhow, Context, Result};
use payjoin::bitcoin::consensus::encode::serialize_hex;
use payjoin::bitcoin::psbt::Psbt;
use payjoin::bitcoin::{Amount, FeeRate};
use payjoin::receive::v2::{NewReceiver, Receiver, UncheckedProposal};
use payjoin::receive::{Error, ImplementationError, ReplyableError};
use payjoin::send::v2::{Sender, SenderBuilder};
use payjoin::Uri;
use tokio::sync::watch;

use super::config::Config;
use super::wallet::BitcoindWallet;
use super::App as AppTrait;
use crate::app::{handle_interrupt, http_agent};
use crate::db::v2::{ReceiverPersister, SenderPersister};
use crate::db::Database;

#[derive(Clone)]
pub(crate) struct App {
    config: Config,
    db: Arc<Database>,
    wallet: BitcoindWallet,
    interrupt: watch::Receiver<()>,
}

#[async_trait::async_trait]
impl AppTrait for App {
    fn new(config: Config) -> Result<Self> {
        let db = Arc::new(Database::create(&config.db_path)?);
        let (interrupt_tx, interrupt_rx) = watch::channel(());
        tokio::spawn(handle_interrupt(interrupt_tx));
        let wallet = BitcoindWallet::new(&config.bitcoind)?;
        let app = Self { config, db, wallet, interrupt: interrupt_rx };
        app.wallet()
            .network()
            .context("Failed to connect to bitcoind. Check config RPC connection.")?;
        Ok(app)
    }

    fn wallet(&self) -> BitcoindWallet { self.wallet.clone() }

    async fn send_payjoin(&self, bip21: &str, fee_rate: FeeRate) -> Result<()> {
        use payjoin::UriExt;
        let uri =
            Uri::try_from(bip21).map_err(|e| anyhow!("Failed to create URI from BIP21: {}", e))?;
        let uri = uri.assume_checked();
        let uri = uri.check_pj_supported().map_err(|_| anyhow!("URI does not support Payjoin"))?;
        let url = uri.extras.endpoint();
        // match bip21 to send_session public_key
        let req_ctx = match self.db.get_send_session(url)? {
            Some(send_session) => send_session,
            None => {
                let psbt = self.create_original_psbt(&uri, fee_rate)?;
                let mut persister = SenderPersister::new(self.db.clone());
                let new_sender = SenderBuilder::new(psbt, uri.clone())
                    .build_recommended(fee_rate)
                    .with_context(|| "Failed to build payjoin request")?;
                let storage_token = new_sender
                    .persist(&mut persister)
                    .map_err(|e| anyhow!("Failed to persist sender: {}", e))?;
                Sender::load(storage_token, &persister)
                    .map_err(|e| anyhow!("Failed to load sender: {}", e))?
            }
        };
        self.spawn_payjoin_sender(req_ctx).await
    }

    async fn receive_payjoin(&self, amount: Amount) -> Result<()> {
        let address = self.wallet().get_new_address()?;
        let ohttp_keys = unwrap_ohttp_keys_or_else_fetch(&self.config).await?;
        let mut persister = ReceiverPersister::new(self.db.clone());
        let new_receiver = NewReceiver::new(
            address,
            self.config.v2()?.pj_directory.clone(),
            ohttp_keys.clone(),
            None,
        )?;
        let storage_token = new_receiver
            .persist(&mut persister)
            .map_err(|e| anyhow!("Failed to persist receiver: {}", e))?;
        let session = Receiver::load(storage_token, &persister)
            .map_err(|e| anyhow!("Failed to load receiver: {}", e))?;
        self.spawn_payjoin_receiver(session, Some(amount)).await
    }

    #[allow(clippy::incompatible_msrv)]
    async fn resume_payjoins(&self) -> Result<()> {
        let recv_sessions = self.db.get_recv_sessions()?;
        let send_sessions = self.db.get_send_sessions()?;

        if recv_sessions.is_empty() && send_sessions.is_empty() {
            println!("No sessions to resume.");
            return Ok(());
        }

        let mut tasks = Vec::new();

        for session in recv_sessions {
            let self_clone = self.clone();
            tasks.push(tokio::spawn(async move {
                self_clone.spawn_payjoin_receiver(session, None).await
            }));
        }

        for session in send_sessions {
            let self_clone = self.clone();
            tasks.push(tokio::spawn(async move { self_clone.spawn_payjoin_sender(session).await }));
        }

        let mut interrupt = self.interrupt.clone();
        tokio::select! {
            _ = async {
                for task in tasks {
                    let _ = task.await;
                }
            } => {
                println!("All resumed sessions completed.");
            }
            _ = interrupt.changed() => {
                println!("Resumed sessions were interrupted.");
            }
        }
        Ok(())
    }

    async fn clear_payjoins(&self, bip_21: Option<&str>) -> Result<()> {
        use payjoin::UriExt;
        if let Some(bip_21) = bip_21 {
            let uri = Uri::try_from(bip_21)
                .map_err(|e| anyhow!("Failed to create URI from BIP21: {}", e))?;
            let uri = uri.assume_checked();
            let uri =
                uri.check_pj_supported().map_err(|_| anyhow!("URI does not support Payjoin"))?;
            let recv_session = self.db.get_recv_session(uri.extras.endpoint())?;
            let send_session = self.db.get_send_session(uri.extras.endpoint())?;

            if recv_session.is_some() || send_session.is_some() {
                if recv_session.is_some() {
                    println!("Removing receiver session with uri: {}", uri);
                    self.db.clear_recv_session(uri.extras.endpoint())?;
                }
                if send_session.is_some() {
                    println!("Removing sender session with uri: {}", uri);
                    self.db.clear_send_session(uri.extras.endpoint())?;
                }
            } else {
                println!("No matching session found with uri: {}", uri);
            }
        } else {
            let send_sessions = self.db.get_send_sessions()?;
            self.db.clear_recv_sessions()?;
            for psbt in send_sessions {
                self.db.clear_send_session(psbt.endpoint())?;
            }
            println!("All sessions removed.")
        }

        Ok(())
    }
}

impl App {
    #[allow(clippy::incompatible_msrv)]
    async fn spawn_payjoin_sender(&self, mut req_ctx: Sender) -> Result<()> {
        let mut interrupt = self.interrupt.clone();
        tokio::select! {
            res = self.long_poll_post(&mut req_ctx) => {
                self.process_pj_response(res?)?;
                self.db.clear_send_session(req_ctx.endpoint())?;
            }
            _ = interrupt.changed() => {
                println!("Interrupted. Call `send` with the same arguments to resume this session or `resume` to resume all sessions.");
            }
        }
        Ok(())
    }

    #[allow(clippy::incompatible_msrv)]
    async fn spawn_payjoin_receiver(
        &self,
        mut session: Receiver,
        amount: Option<Amount>,
    ) -> Result<()> {
        println!("Receive session established");
        let mut pj_uri = session.pj_uri();
        pj_uri.amount = amount;
        println!("Request Payjoin by sharing this Payjoin Uri:");
        println!("{}", pj_uri);

        let mut interrupt = self.interrupt.clone();
        let receiver = tokio::select! {
            res = self.long_poll_fallback(&mut session) => res,
            _ = interrupt.changed() => {
                println!("Interrupted. Call the `resume` command to resume all sessions.");
                return Ok(());
            }
        }?;

        println!("Fallback transaction received. Consider broadcasting this to get paid if the Payjoin fails:");
        println!("{}", serialize_hex(&receiver.extract_tx_to_schedule_broadcast()));
        let mut payjoin_proposal = match self.process_v2_proposal(receiver.clone()) {
            Ok(proposal) => proposal,
            Err(Error::ReplyToSender(e)) => {
                return Err(
                    handle_recoverable_error(e, receiver, &self.config.v2()?.ohttp_relay).await
                );
            }
            Err(e) => return Err(e.into()),
        };
        let (req, ohttp_ctx) = payjoin_proposal
            .extract_req(&self.config.v2()?.ohttp_relay)
            .map_err(|e| anyhow!("v2 req extraction failed {}", e))?;
        println!("Got a request from the sender. Responding with a Payjoin proposal.");
        let res = post_request(req).await?;
        payjoin_proposal
            .process_res(&res.bytes().await?, ohttp_ctx)
            .map_err(|e| anyhow!("Failed to deserialize response {}", e))?;
        let payjoin_psbt = payjoin_proposal.psbt().clone();
        println!(
            "Response successful. Watch mempool for successful Payjoin. TXID: {}",
            payjoin_psbt.extract_tx_unchecked_fee_rate().clone().compute_txid()
        );
        self.db.clear_recv_sessions()?;
        Ok(())
    }

    async fn long_poll_post(&self, req_ctx: &mut Sender) -> Result<Psbt> {
        match req_ctx.extract_v2(self.config.v2()?.ohttp_relay.clone()) {
            Ok((req, ctx)) => {
                println!("Posting Original PSBT Payload request...");
                let response = post_request(req).await?;
                println!("Sent fallback transaction");
                let v2_ctx = Arc::new(ctx.process_response(&response.bytes().await?)?);
                loop {
                    let (req, ohttp_ctx) =
                        v2_ctx.extract_req(self.config.v2()?.ohttp_relay.clone())?;
                    let response = post_request(req).await?;
                    match v2_ctx.process_response(&response.bytes().await?, ohttp_ctx) {
                        Ok(Some(psbt)) => return Ok(psbt),
                        Ok(None) => {
                            println!("No response yet.");
                        }
                        Err(re) => {
                            println!("{}", re);
                            log::debug!("{:?}", re);
                            return Err(anyhow!("Response error").context(re));
                        }
                    }
                }
            }
            Err(_) => {
                let (req, v1_ctx) = req_ctx.extract_v1();
                println!("Posting Original PSBT Payload request...");
                let response = post_request(req).await?;
                println!("Sent fallback transaction");
                match v1_ctx.process_response(&mut response.bytes().await?.to_vec().as_slice()) {
                    Ok(psbt) => Ok(psbt),
                    Err(re) => {
                        println!("{}", re);
                        log::debug!("{:?}", re);
                        Err(anyhow!("Response error").context(re))
                    }
                }
            }
        }
    }

    async fn long_poll_fallback(
        &self,
        session: &mut payjoin::receive::v2::Receiver,
    ) -> Result<payjoin::receive::v2::UncheckedProposal> {
        loop {
            let (req, context) = session.extract_req(&self.config.v2()?.ohttp_relay)?;
            println!("Polling receive request...");
            let ohttp_response = post_request(req).await?;
            let proposal = session
                .process_res(ohttp_response.bytes().await?.to_vec().as_slice(), context)
                .map_err(|_| anyhow!("GET fallback failed"))?;
            log::debug!("got response");
            if let Some(proposal) = proposal {
                break Ok(proposal);
            }
        }
    }

    fn process_v2_proposal(
        &self,
        proposal: payjoin::receive::v2::UncheckedProposal,
    ) -> Result<payjoin::receive::v2::PayjoinProposal, Error> {
        let wallet = self.wallet();

        // in a payment processor where the sender could go offline, this is where you schedule to broadcast the original_tx
        let _to_broadcast_in_failure_case = proposal.extract_tx_to_schedule_broadcast();

        // Receive Check 1: Can Broadcast
        let proposal =
            proposal.check_broadcast_suitability(None, |tx| Ok(wallet.can_broadcast(tx)?))?;
        log::trace!("check1");

        // Receive Check 2: receiver can't sign for proposal inputs
        let proposal = proposal.check_inputs_not_owned(|input| Ok(wallet.is_mine(input)?))?;
        log::trace!("check2");

        // Receive Check 3: have we seen this input before? More of a check for non-interactive i.e. payment processor receivers.
        let payjoin = proposal
            .check_no_inputs_seen_before(|input| Ok(self.db.insert_input_seen_before(*input)?))?;
        log::trace!("check3");

        let payjoin = payjoin
            .identify_receiver_outputs(|output_script| Ok(wallet.is_mine(output_script)?))?
            .commit_outputs();

        let provisional_payjoin = try_contributing_inputs(payjoin.clone(), &wallet)
            .map_err(ReplyableError::Implementation)?;

        let payjoin_proposal = provisional_payjoin.finalize_proposal(
            |psbt| Ok(wallet.process_psbt(psbt)?),
            None,
            self.config.max_fee_rate,
        )?;
        let payjoin_proposal_psbt = payjoin_proposal.psbt();
        log::debug!("Receiver's Payjoin proposal PSBT Rsponse: {:#?}", payjoin_proposal_psbt);
        Ok(payjoin_proposal)
    }
}

/// Handle request error by sending an error response over the directory
async fn handle_recoverable_error(
    e: ReplyableError,
    mut receiver: UncheckedProposal,
    ohttp_relay: &payjoin::Url,
) -> anyhow::Error {
    let to_return = anyhow!("Replied with error: {}", e);
    let (err_req, err_ctx) = match receiver.extract_err_req(&e.into(), ohttp_relay) {
        Ok(req_ctx) => req_ctx,
        Err(e) => return anyhow!("Failed to extract error request: {}", e),
    };

    let err_response = match post_request(err_req).await {
        Ok(response) => response,
        Err(e) => return anyhow!("Failed to post error request: {}", e),
    };

    let err_bytes = match err_response.bytes().await {
        Ok(bytes) => bytes,
        Err(e) => return anyhow!("Failed to get error response bytes: {}", e),
    };

    if let Err(e) = receiver.process_err_res(&err_bytes, err_ctx) {
        return anyhow!("Failed to process error response: {}", e);
    }

    to_return
}

fn try_contributing_inputs(
    payjoin: payjoin::receive::v2::WantsInputs,
    wallet: &BitcoindWallet,
) -> Result<payjoin::receive::v2::ProvisionalProposal, ImplementationError> {
    let candidate_inputs = wallet.list_unspent()?;

    let selected_input =
        payjoin.try_preserving_privacy(candidate_inputs).map_err(ImplementationError::from)?;

    Ok(payjoin
        .contribute_inputs(vec![selected_input])
        .map_err(ImplementationError::from)?
        .commit_inputs())
}

async fn unwrap_ohttp_keys_or_else_fetch(config: &Config) -> Result<payjoin::OhttpKeys> {
    if let Some(keys) = config.v2()?.ohttp_keys.clone() {
        println!("Using OHTTP Keys from config");
        Ok(keys)
    } else {
        println!("Bootstrapping private network transport over Oblivious HTTP");
        let ohttp_relay = config.v2()?.ohttp_relay.clone();
        let payjoin_directory = config.v2()?.pj_directory.clone();
        #[cfg(feature = "_danger-local-https")]
        let ohttp_keys = {
            let cert_der = crate::app::read_local_cert()?;
            payjoin::io::fetch_ohttp_keys_with_cert(ohttp_relay, payjoin_directory, cert_der)
                .await?
        };
        #[cfg(not(feature = "_danger-local-https"))]
        let ohttp_keys = payjoin::io::fetch_ohttp_keys(ohttp_relay, payjoin_directory).await?;
        Ok(ohttp_keys)
    }
}

async fn post_request(req: payjoin::Request) -> Result<reqwest::Response> {
    let http = http_agent()?;
    http.post(req.url)
        .header("Content-Type", req.content_type)
        .body(req.body)
        .send()
        .await
        .map_err(map_reqwest_err)
}

fn map_reqwest_err(e: reqwest::Error) -> anyhow::Error {
    match e.status() {
        Some(status_code) => anyhow!("HTTP request failed: {} {}", status_code, e),
        None => anyhow!("No HTTP response: {}", e),
    }
}

1	use std::sync::Arc;
2
3	use anyhow::{anyhow, Context, Result};
4	use payjoin::bitcoin::consensus::encode::serialize_hex;
5	use payjoin::bitcoin::psbt::Psbt;
6	use payjoin::bitcoin::{Amount, FeeRate};
7	use payjoin::receive::v2::{NewReceiver, Receiver, UncheckedProposal};
8	use payjoin::receive::{Error, ImplementationError, ReplyableError};
9	use payjoin::send::v2::{Sender, SenderBuilder};
10	use payjoin::Uri;
11	use tokio::sync::watch;
12
13	use super::config::Config;
14	use super::wallet::BitcoindWallet;
15	use super::App as AppTrait;
16	use crate::app::{handle_interrupt, http_agent};
17	use crate::db::v2::{ReceiverPersister, SenderPersister};
18	use crate::db::Database;
19
20	#[derive(Clone)]
21	pub(crate) struct App {
22	config: Config,
23	db: Arc<Database>,
24	wallet: BitcoindWallet,
25	interrupt: watch::Receiver<()>,
26	}
27
28	#[async_trait::async_trait]
29	impl AppTrait for App {
30	fn new(config: Config) -> Result<Self> {	4✔
31	let db = Arc::new(Database::create(&config.db_path)?);	4✔
32	let (interrupt_tx, interrupt_rx) = watch::channel(());	4✔
33	tokio::spawn(handle_interrupt(interrupt_tx));	4✔
34	let wallet = BitcoindWallet::new(&config.bitcoind)?;	4✔
35	let app = Self { config, db, wallet, interrupt: interrupt_rx };	4✔
36	app.wallet()	4✔
37	.network()	4✔
38	.context("Failed to connect to bitcoind. Check config RPC connection.")?;	4✔
39	Ok(app)	4✔
40	}	4✔
41
42	fn wallet(&self) -> BitcoindWallet { self.wallet.clone() }	10✔
43
44	async fn send_payjoin(&self, bip21: &str, fee_rate: FeeRate) -> Result<()> {	2✔
45	use payjoin::UriExt;
46	let uri =	2✔
47	Uri::try_from(bip21).map_err(\|e\| anyhow!("Failed to create URI from BIP21: {}", e))?;	2✔
48	let uri = uri.assume_checked();	2✔
49	let uri = uri.check_pj_supported().map_err(\|_\| anyhow!("URI does not support Payjoin"))?;	2✔
50	let url = uri.extras.endpoint();	2✔
51	// match bip21 to send_session public_key
52	let req_ctx = match self.db.get_send_session(url)? {	2✔
53	Some(send_session) => send_session,	1✔
54	None => {
55	let psbt = self.create_original_psbt(&uri, fee_rate)?;	1✔
56	let mut persister = SenderPersister::new(self.db.clone());	1✔
57	let new_sender = SenderBuilder::new(psbt, uri.clone())	1✔
58	.build_recommended(fee_rate)	1✔
59	.with_context(\|\| "Failed to build payjoin request")?;	1✔
60	let storage_token = new_sender	1✔
61	.persist(&mut persister)	1✔
62	.map_err(\|e\| anyhow!("Failed to persist sender: {}", e))?;	1✔
63	Sender::load(storage_token, &persister)	1✔
64	.map_err(\|e\| anyhow!("Failed to load sender: {}", e))?	1✔
65	}
66	};
67	self.spawn_payjoin_sender(req_ctx).await	2✔
68	}	4✔
69
70	async fn receive_payjoin(&self, amount: Amount) -> Result<()> {	1✔
71	let address = self.wallet().get_new_address()?;	1✔
72	let ohttp_keys = unwrap_ohttp_keys_or_else_fetch(&self.config).await?;	1✔
73	let mut persister = ReceiverPersister::new(self.db.clone());	1✔
74	let new_receiver = NewReceiver::new(	1✔
75	address,	1✔
76	self.config.v2()?.pj_directory.clone(),	1✔
77	ohttp_keys.clone(),	1✔
78	None,	1✔
79	)?;	×
80	let storage_token = new_receiver	1✔
81	.persist(&mut persister)	1✔
82	.map_err(\|e\| anyhow!("Failed to persist receiver: {}", e))?;	1✔
83	let session = Receiver::load(storage_token, &persister)	1✔
84	.map_err(\|e\| anyhow!("Failed to load receiver: {}", e))?;	1✔
85	self.spawn_payjoin_receiver(session, Some(amount)).await	1✔
86	}	2✔
87
88	#[allow(clippy::incompatible_msrv)]
89	async fn resume_payjoins(&self) -> Result<()> {	1✔
90	let recv_sessions = self.db.get_recv_sessions()?;	1✔
91	let send_sessions = self.db.get_send_sessions()?;	1✔
92
93	if recv_sessions.is_empty() && send_sessions.is_empty() {	1✔
94	println!("No sessions to resume.");	×
95	return Ok(());	×
96	}	1✔
97		1✔
98	let mut tasks = Vec::new();	1✔
99
100	for session in recv_sessions {	2✔
101	let self_clone = self.clone();	1✔
102	tasks.push(tokio::spawn(async move {	1✔
103	self_clone.spawn_payjoin_receiver(session, None).await	1✔
104	}));	1✔
105	}	1✔
106
107	for session in send_sessions {	1✔
108	let self_clone = self.clone();	×
109	tasks.push(tokio::spawn(async move { self_clone.spawn_payjoin_sender(session).await }));	×
110	}	×
111
112	let mut interrupt = self.interrupt.clone();	1✔
113	tokio::select! {	1✔
114	_ = async {	1✔
115	for task in tasks {	1✔
116	let _ = task.await;	1✔
117	}
118	} => {	×
119	println!("All resumed sessions completed.");	×
120	}	×
121	_ = interrupt.changed() => {	1✔
122	println!("Resumed sessions were interrupted.");	1✔
123	}	1✔
124	}
125	Ok(())	1✔
126	}	2✔
127
NEW 128	async fn clear_payjoins(&self, bip_21: Option<&str>) -> Result<()> {	×
129	use payjoin::UriExt;
NEW 130	if let Some(bip_21) = bip_21 {	×
NEW 131	let uri = Uri::try_from(bip_21)	×
NEW 132	.map_err(\|e\| anyhow!("Failed to create URI from BIP21: {}", e))?;	×
NEW 133	let uri = uri.assume_checked();	×
NEW 134	let uri =	×
NEW 135	uri.check_pj_supported().map_err(\|_\| anyhow!("URI does not support Payjoin"))?;	×
NEW 136	let recv_session = self.db.get_recv_session(uri.extras.endpoint())?;	×
NEW 137	let send_session = self.db.get_send_session(uri.extras.endpoint())?;	×
138
NEW 139	if recv_session.is_some() \|\| send_session.is_some() {	×
NEW 140	if recv_session.is_some() {	×
NEW 141	println!("Removing receiver session with uri: {}", uri);	×
NEW 142	self.db.clear_recv_session(uri.extras.endpoint())?;	×
NEW 143	}	×
NEW 144	if send_session.is_some() {	×
NEW 145	println!("Removing sender session with uri: {}", uri);	×
NEW 146	self.db.clear_send_session(uri.extras.endpoint())?;	×
NEW 147	}	×
NEW 148	} else {	×
NEW 149	println!("No matching session found with uri: {}", uri);	×
NEW 150	}	×
151	} else {
NEW 152	let send_sessions = self.db.get_send_sessions()?;	×
NEW 153	self.db.clear_recv_sessions()?;	×
NEW 154	for psbt in send_sessions {	×
NEW 155	self.db.clear_send_session(psbt.endpoint())?;	×
156	}
NEW 157	println!("All sessions removed.")	×
158	}
159
NEW 160	Ok(())	×
NEW 161	}	×
162	}
163
164	impl App {
165	#[allow(clippy::incompatible_msrv)]
166	async fn spawn_payjoin_sender(&self, mut req_ctx: Sender) -> Result<()> {	2✔
167	let mut interrupt = self.interrupt.clone();	2✔
168	tokio::select! {	2✔
169	res = self.long_poll_post(&mut req_ctx) => {	2✔
170	self.process_pj_response(res?)?;	1✔
171	self.db.clear_send_session(req_ctx.endpoint())?;	1✔
172	}
173	_ = interrupt.changed() => {	2✔
174	println!("Interrupted. Call `send` with the same arguments to resume this session or `resume` to resume all sessions.");	1✔
175	}	1✔
176	}
177	Ok(())	2✔
178	}	2✔
179
180	#[allow(clippy::incompatible_msrv)]
181	async fn spawn_payjoin_receiver(	2✔
182	&self,	2✔
183	mut session: Receiver,	2✔
184	amount: Option<Amount>,	2✔
185	) -> Result<()> {	2✔
186	println!("Receive session established");	2✔
187	let mut pj_uri = session.pj_uri();	2✔
188	pj_uri.amount = amount;	2✔
189	println!("Request Payjoin by sharing this Payjoin Uri:");	2✔
190	println!("{}", pj_uri);	2✔
191		2✔
192	let mut interrupt = self.interrupt.clone();	2✔
193	let receiver = tokio::select! {	2✔
194	res = self.long_poll_fallback(&mut session) => res,	2✔
195	_ = interrupt.changed() => {	2✔
196	println!("Interrupted. Call the `resume` command to resume all sessions.");	1✔
197	return Ok(());	1✔
198	}
199	}?;	×
200
201	println!("Fallback transaction received. Consider broadcasting this to get paid if the Payjoin fails:");	1✔
202	println!("{}", serialize_hex(&receiver.extract_tx_to_schedule_broadcast()));	1✔
203	let mut payjoin_proposal = match self.process_v2_proposal(receiver.clone()) {	1✔
204	Ok(proposal) => proposal,	1✔
205	Err(Error::ReplyToSender(e)) => {	×
206	return Err(	×
207	handle_recoverable_error(e, receiver, &self.config.v2()?.ohttp_relay).await	×
208	);
209	}
210	Err(e) => return Err(e.into()),	×
211	};
212	let (req, ohttp_ctx) = payjoin_proposal	1✔
213	.extract_req(&self.config.v2()?.ohttp_relay)	1✔
214	.map_err(\|e\| anyhow!("v2 req extraction failed {}", e))?;	1✔
215	println!("Got a request from the sender. Responding with a Payjoin proposal.");	1✔
216	let res = post_request(req).await?;	1✔
217	payjoin_proposal	1✔
218	.process_res(&res.bytes().await?, ohttp_ctx)	1✔
219	.map_err(\|e\| anyhow!("Failed to deserialize response {}", e))?;	1✔
220	let payjoin_psbt = payjoin_proposal.psbt().clone();	1✔
221	println!(	1✔
222	"Response successful. Watch mempool for successful Payjoin. TXID: {}",	1✔
223	payjoin_psbt.extract_tx_unchecked_fee_rate().clone().compute_txid()	1✔
224	);	1✔
225	self.db.clear_recv_sessions()?;	1✔
226	Ok(())	1✔
227	}	2✔
228
229	async fn long_poll_post(&self, req_ctx: &mut Sender) -> Result<Psbt> {	2✔
230	match req_ctx.extract_v2(self.config.v2()?.ohttp_relay.clone()) {	2✔
231	Ok((req, ctx)) => {	2✔
232	println!("Posting Original PSBT Payload request...");	2✔
233	let response = post_request(req).await?;	2✔
234	println!("Sent fallback transaction");	2✔
235	let v2_ctx = Arc::new(ctx.process_response(&response.bytes().await?)?);	2✔
236	loop {
237	let (req, ohttp_ctx) =	3✔
238	v2_ctx.extract_req(self.config.v2()?.ohttp_relay.clone())?;	3✔
239	let response = post_request(req).await?;	3✔
240	match v2_ctx.process_response(&response.bytes().await?, ohttp_ctx) {	2✔
241	Ok(Some(psbt)) => return Ok(psbt),	1✔
242	Ok(None) => {	1✔
243	println!("No response yet.");	1✔
244	}	1✔
245	Err(re) => {	×
246	println!("{}", re);	×
247	log::debug!("{:?}", re);	×
248	return Err(anyhow!("Response error").context(re));	×
249	}
250	}
251	}
252	}
253	Err(_) => {
254	let (req, v1_ctx) = req_ctx.extract_v1();	×
255	println!("Posting Original PSBT Payload request...");	×
256	let response = post_request(req).await?;	×
257	println!("Sent fallback transaction");	×
258	match v1_ctx.process_response(&mut response.bytes().await?.to_vec().as_slice()) {	×
259	Ok(psbt) => Ok(psbt),	×
260	Err(re) => {	×
261	println!("{}", re);	×
262	log::debug!("{:?}", re);	×
263	Err(anyhow!("Response error").context(re))	×
264	}
265	}
266	}
267	}
268	}	1✔
269
270	async fn long_poll_fallback(	2✔
271	&self,	2✔
272	session: &mut payjoin::receive::v2::Receiver,	2✔
273	) -> Result<payjoin::receive::v2::UncheckedProposal> {	2✔
274	loop {
275	let (req, context) = session.extract_req(&self.config.v2()?.ohttp_relay)?;	2✔
276	println!("Polling receive request...");	2✔
277	let ohttp_response = post_request(req).await?;	2✔
278	let proposal = session	1✔
279	.process_res(ohttp_response.bytes().await?.to_vec().as_slice(), context)	1✔
280	.map_err(\|_\| anyhow!("GET fallback failed"))?;	1✔
281	log::debug!("got response");	1✔
282	if let Some(proposal) = proposal {	1✔
283	break Ok(proposal);	1✔
284	}	×
285	}
286	}	1✔
287
288	fn process_v2_proposal(	1✔
289	&self,	1✔
290	proposal: payjoin::receive::v2::UncheckedProposal,	1✔
291	) -> Result<payjoin::receive::v2::PayjoinProposal, Error> {	1✔
292	let wallet = self.wallet();	1✔
293		1✔
294	// in a payment processor where the sender could go offline, this is where you schedule to broadcast the original_tx	1✔
295	let _to_broadcast_in_failure_case = proposal.extract_tx_to_schedule_broadcast();	1✔
296
297	// Receive Check 1: Can Broadcast
298	let proposal =	1✔
299	proposal.check_broadcast_suitability(None, \|tx\| Ok(wallet.can_broadcast(tx)?))?;	1✔
300	log::trace!("check1");	1✔
301
302	// Receive Check 2: receiver can't sign for proposal inputs
303	let proposal = proposal.check_inputs_not_owned(\|input\| Ok(wallet.is_mine(input)?))?;	1✔
304	log::trace!("check2");	1✔
305
306	// Receive Check 3: have we seen this input before? More of a check for non-interactive i.e. payment processor receivers.
307	let payjoin = proposal	1✔
308	.check_no_inputs_seen_before(\|input\| Ok(self.db.insert_input_seen_before(*input)?))?;	1✔
309	log::trace!("check3");	1✔
310
311	let payjoin = payjoin	1✔
312	.identify_receiver_outputs(\|output_script\| Ok(wallet.is_mine(output_script)?))?	2✔
313	.commit_outputs();	1✔
314
315	let provisional_payjoin = try_contributing_inputs(payjoin.clone(), &wallet)	1✔
316	.map_err(ReplyableError::Implementation)?;	1✔
317
318	let payjoin_proposal = provisional_payjoin.finalize_proposal(	1✔
319	\|psbt\| Ok(wallet.process_psbt(psbt)?),	1✔
320	None,	1✔
321	self.config.max_fee_rate,	1✔
322	)?;	1✔
323	let payjoin_proposal_psbt = payjoin_proposal.psbt();	1✔
324	log::debug!("Receiver's Payjoin proposal PSBT Rsponse: {:#?}", payjoin_proposal_psbt);	1✔
325	Ok(payjoin_proposal)	1✔
326	}	1✔
327	}
328
329	/// Handle request error by sending an error response over the directory
330	async fn handle_recoverable_error(	×
331	e: ReplyableError,	×
332	mut receiver: UncheckedProposal,	×
333	ohttp_relay: &payjoin::Url,	×
334	) -> anyhow::Error {	×
335	let to_return = anyhow!("Replied with error: {}", e);	×
336	let (err_req, err_ctx) = match receiver.extract_err_req(&e.into(), ohttp_relay) {	×
337	Ok(req_ctx) => req_ctx,	×
338	Err(e) => return anyhow!("Failed to extract error request: {}", e),	×
339	};
340
341	let err_response = match post_request(err_req).await {	×
342	Ok(response) => response,	×
343	Err(e) => return anyhow!("Failed to post error request: {}", e),	×
344	};
345
346	let err_bytes = match err_response.bytes().await {	×
347	Ok(bytes) => bytes,	×
348	Err(e) => return anyhow!("Failed to get error response bytes: {}", e),	×
349	};
350
351	if let Err(e) = receiver.process_err_res(&err_bytes, err_ctx) {	×
352	return anyhow!("Failed to process error response: {}", e);	×
353	}	×
354		×
355	to_return	×
356	}	×
357
358	fn try_contributing_inputs(	1✔
359	payjoin: payjoin::receive::v2::WantsInputs,	1✔
360	wallet: &BitcoindWallet,	1✔
361	) -> Result<payjoin::receive::v2::ProvisionalProposal, ImplementationError> {	1✔
362	let candidate_inputs = wallet.list_unspent()?;	1✔
363
364	let selected_input =	1✔
365	payjoin.try_preserving_privacy(candidate_inputs).map_err(ImplementationError::from)?;	1✔
366
367	Ok(payjoin	1✔
368	.contribute_inputs(vec![selected_input])	1✔
369	.map_err(ImplementationError::from)?	1✔
370	.commit_inputs())	1✔
371	}	1✔
372
373	async fn unwrap_ohttp_keys_or_else_fetch(config: &Config) -> Result<payjoin::OhttpKeys> {	1✔
374	if let Some(keys) = config.v2()?.ohttp_keys.clone() {	1✔
375	println!("Using OHTTP Keys from config");	1✔
376	Ok(keys)	1✔
377	} else {
378	println!("Bootstrapping private network transport over Oblivious HTTP");	×
379	let ohttp_relay = config.v2()?.ohttp_relay.clone();	×
380	let payjoin_directory = config.v2()?.pj_directory.clone();	×
381	#[cfg(feature = "_danger-local-https")]
382	let ohttp_keys = {	×
383	let cert_der = crate::app::read_local_cert()?;	×
384	payjoin::io::fetch_ohttp_keys_with_cert(ohttp_relay, payjoin_directory, cert_der)	×
385	.await?	×
386	};
387	#[cfg(not(feature = "_danger-local-https"))]
388	let ohttp_keys = payjoin::io::fetch_ohttp_keys(ohttp_relay, payjoin_directory).await?;
389	Ok(ohttp_keys)	×
390	}
391	}	1✔
392
393	async fn post_request(req: payjoin::Request) -> Result<reqwest::Response> {	8✔
394	let http = http_agent()?;	8✔
395	http.post(req.url)	8✔
396	.header("Content-Type", req.content_type)	8✔
397	.body(req.body)	8✔
398	.send()	8✔
399	.await	8✔
400	.map_err(map_reqwest_err)	6✔
401	}	6✔
402
403	fn map_reqwest_err(e: reqwest::Error) -> anyhow::Error {	×
404	match e.status() {	×
405	Some(status_code) => anyhow!("HTTP request failed: {} {}", status_code, e),	×
406	None => anyhow!("No HTTP response: {}", e),	×
407	}
408	}	×

payjoin / rust-payjoin / 14228368139

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